Osman and Mehmed II are seen as great leaders almost without flaws. Suleiman is seen great as well by majority, but some claim that ottoman stagnation starts with Suleiman, his militaristic success is not doubted, but first signs of economical problems -which led the demise of the empire- started in his reign.
1) anthem of the tenth year. this anthem is composed for tenth year of the republic. and it singlehandedly symbolyses ataturks rule between 1923 -1938.
http://www.dailymotion.com/video/xayuf7_tsk-bandosu-10-yyl-maryy_people
2) Anthem of İzmir: Anthem composed for liberation of İzmir and praise to Atatürk.
http://www.youtube.com/watch?v=H9S_j3LwuIc&feature=related
3) I am unsure if you should use this. It's a personal favorite of ataturk. At least this song is known for being the song ataturk likes the most.
http://www.youtube.com/watch?v=GFirpJj_RQg
4) This one is actually a Sweden Folk Song. But written turkish lyrics in 1916 and song by Ataturk and his friends in "SS Bandırma" and represents Turkish war of independence.
http://www.youtube.com/watch?v=bzzS72dNopc
5) here's a few songs from that time too soo you could use them. But 10th year anthem and izmir anthem are must be in these three i guess.
http://www.youtube.com/watch?v=U-fTzMO-1vk
http://www.youtube.com/watch?v=poxXOPRkQtM&feature=related
http://www.youtube.com/watch?v=c0cnjVnKxm8&feature=related